Removal of divalent heavy metal mixtures from water by Saccharomyces Cerevisiae using crossflow microfiltration

Bayhan, Yalçın Kemal; Keskinler, Bülent; Çakıcı, Avni; Levent, Menderes; Akay, G.

doi:10.1016/s0043-1354(00)00499-1

Cited by 81 publications

(40 citation statements)

References 15 publications

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“…Heavy metals such as cadmium, lead, zinc, copper, and chromium or their compounds have been used extensively by various metal-finishing, mining and chemical industries (Hamidi et al 2008). The presence of these heavy metals affects numerous metabolic or developmental processes in all living organisms (Přibyl et al 2008) because of its toxicity, nonbiodegradability, bioaccumulation and persistence in nature (Bayhan et al 2001;Villaescusaa et al 2004;Ahluwalia and Goyal 2007;Bahadir et al 2007;Garg et al 2007;Pérez-Marín et al 2007;Bulut and Baysal 2006;Kamala-Kannan et al 2008;Vilar et al 2008;Wang and Fowler 2008;Pathak et al 2009;Bhatnagar and Minocha 2010;Farooq et al 2010;Pahlavanzadeha et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Cd, Cr, Cu, Pb, and Zn concentrations in Ulva lactuca, Codium fragile, Jania rubens, and Dictyota dichotoma from Rabta Bay, Jijel (Algeria)

Laib

Leghouchi

2011

Environ Monit Assess

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Concentrations of Cd, Cr, Cu, Pb, and Zn were determined in algae samples collected from the Rabta Bay in the Mediterranean Sea, Algeria. The levels of heavy metals in the macroalgae, Ulva lactuca, Codium fragile (green algae), Jania rubens (red algae), and Dictyota dichotoma (brown algae) recorded high concentrations except for Cd. Moreover, Zn was the most predominant metal in the seaweeds. The obtained HM contents indicate that different species demonstrate various degree of metal accumulation and the obtained higher values in site 1 of the studied zone can be attributed to the discharge influence of two rivers (Mouttas and Larayeche Rivers), entering the Mediterranean Sea and local pollutant emissions. The abundance of heavy metal concentrations in the macroalgae samples was found in the order below: Zn > Cu > Pb > Cr > Cd from the studied zone. The highest amounts of heavy metals in algae samples were Cd, Cu, and Pb in brown algae, and Cr and Zn in green and brown algae from the studied zone (Rabta Bay).

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Section: Introductionmentioning

confidence: 99%

Cd, Cr, Cu, Pb, and Zn concentrations in Ulva lactuca, Codium fragile, Jania rubens, and Dictyota dichotoma from Rabta Bay, Jijel (Algeria)

Laib

Leghouchi

2011

Environ Monit Assess

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“…Consequently, biocatalyst membranes and specially designed bioreactors, such as jet loop and membrane reactors, are available to intensify biochemical reactions (Giorno and Drioli, 2000;Bayhan et al, 2001;Akay et al, 2002a;Erhan et al, 2002;Keskinler et al, 2004;Pekdemir et al, 2003;Akay, 2005). Supported biocatalysts are often employed in order to enhance catalytic activity and stability, to protect enzymes/ microorganisms from mechanical degradation and deactivation (Giorno and Drioli, 2000;De Bartolo et al, 2001;Akay et al, 2002a;Erhan et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Bioprocess intensification in flow‐through monolithic microbioreactors with immobilized bacteria

Akay

Erhan

Keskinler

2005

Biotech & Bioengineering

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Microporous polymers (with porosity up to 90%) with a well-prescribed internal microstructure were prepared in monolithic form to construct a flow-through microbioreactor in which phenol-degrading bacteria, Pseudomonas syringae, was immobilized. Initially, bacteria was forced seeded within the pores and subsequently allowed to proliferate followed by acclimatization and phenol degradation at various initial substrate concentrations and flow rates. Two types of microporous polymer were used as the monolithic support. These polymers differ with respect to their pore and interconnect sizes, macroscopic surface area for bacterial support, and phase volume. Polymer with a nominal pore size of 100 microm with phase volume of 90% (with highly open pore structure) yielded reduced bacterial proliferation, while the polymer with nominal pore size of 25 microm with phase volume of 85% (with small interconnect size and large pore area for bacterial adhesion) yielded monolayer bacterial proliferation. Bacteria within the 25 microm polymer support remained monolayered, without any apparent production of extracellular matrix during the 30-day continuous experimental period. The microbioreactor performance was characterized in terms of volumetric utilization rate and compared with the published data, including the case where the same bacteria was immobilized on the surface of microporous polymer beads and used in a packed bed during continuous degradation of phenol. It is shown that at similar initial substrate concentration, the volumetric utilization in the microreactor is at least 20-fold more efficient than the packed bed, depending on the flow rate of the substrate solution. The concentration of the bacteria within the pores of the microreactor decreases from 2.25 cells per microm2 on the top surface to about 0.4 cells per microm2 within 3 mm reactor depth. If the bacteria-depleted part of the microreactor is disregarded, the volumetric utilization increases by a factor of 30-fold compared with the packed bed. This efficiency increase is attributed to the reduction of diffusion path for the substrate and nutrients and enhanced availability of the bacteria for bioconversion in the absence of biofilm formation as well as the presence of flow over the surface of the monolayer bacteria.

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“…Traditional processes have been employed, along with new technologies, with the aim of contributing to the removal of metals present in the effluent wastewater 1 . Among various existing processes there are: ion exchange 2 , the chemical precipitation 3 and ultrafiltration 4 .…”

Section: Introductionmentioning

confidence: 99%

Characterization of the complex metal-clay obtained in the process of lead adsorption

et al. 2014

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This study aims to characterize the complex metal-clay formed by adsorption of lead. In this work, the bentonite clay named Fluidgel was calcined at 750 °C and was used as adsorbent for lead removal. The characterization of this clay and complex metal-clay was carried out by X-ray diffraction (XRD), Fourier transformer infrared spectroscopy (FTIR), surface area (BET method), scanning electron microscopy (SEM) and chemical composition by energy dispersive X-ray (EDX). The removal of lead from aqueous solution was carried out in a fixed bed. Dynamic experiments were performed to evaluate the effect of flowrate on adsorption efficiency. The experiments were accomplished at room temperature, the clay adsorbent particle diameter was of 0.855 mm and the flow rate varied from 0.6 to 2 mL/min. The feed concentration of lead was about 0.24 mmol/L. Comparing the chemical compositions of the clays obtained by EDX before and after removal of the lead, it was concluded that the ion exchange process might be important to lead removal. From the semi-quantitative analysis of chemical composition in clays with and without adsorbed lead it was observed a reduction of the amount of Ca 2+ , K + cations and the disappearance of Na + cations, which was caused by cation exchange process.

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Removal of divalent heavy metal mixtures from water by Saccharomyces Cerevisiae using crossflow microfiltration

Cited by 81 publications

References 15 publications

Cd, Cr, Cu, Pb, and Zn concentrations in Ulva lactuca, Codium fragile, Jania rubens, and Dictyota dichotoma from Rabta Bay, Jijel (Algeria)

Cd, Cr, Cu, Pb, and Zn concentrations in Ulva lactuca, Codium fragile, Jania rubens, and Dictyota dichotoma from Rabta Bay, Jijel (Algeria)

Bioprocess intensification in flow‐through monolithic microbioreactors with immobilized bacteria

Characterization of the complex metal-clay obtained in the process of lead adsorption

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